Mat roaster



June 10, 1930. c, ROESEN 1,762,399

MAT ROASTER Filed Aug. 11, 1926 5 Sheets-Sheet l Qatar 6. PaUc-w who [MW4 Jun e 10, 1930. QROESEN 1,762,309

MAT ROASTER Filed Aug. 11, 1926 5 Sheets-Sheet 3 :77 277W flrcae" (.2 06den June 10, 1930. 0, c, ROESEN 1,762,309

MAT ROASTER Filed Aug. 11. 1926 5 Sheets-Sheet 4 June 10, 1930. o, c,ROESEN 1,762,309

MAT ROASTER Filed Aug. 11, 1926 5 Sheets-Sheet 5 lfinfari wcecfiaeaen.

Patented June 10, 1930 UNITED STATES PATaNTorFicE OSCAR CHARLES ROESEN,F BROOKLYN, NEW YORK, ASSIGNOR TOWOOD NEWSPAPER MACHINERY CORPORATIONQOFNEW YORK; N. Y., A CORPORATION OF VIRGINIA MAT ROASTER Application filedAugust 11, 1926'. Serial No. 128,687.

. This invention relates to a device for drying or roasting matricesused in the casting of stereotype printing plates.

to provide a machine which will roast the matrices continuously; whichwill continue the roasting operation exactly the same length of time forall matrices so as to get uniform results; which will roast more thanone matrix at a time and greatly speedup this operation; also to providea machine in which the matrices are introduced into the roaster andtaken from it, preferably without placing them by hand in exactly theposition desired and without handling themat all when they aredelivered; and to provide also for automatic introduction and delivery.

of the matrices.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in Which--- Fig. 1is an end view of a rotary roaster constructedin accordance with thisinvention; i

Fig. 2 is a rear view thereof artly in section on a vertical plane extening through the axis of the roastin drum;

Fig 3 is a view simi ar to Fig.1 showing a modified construction;

Fig. 4 is a view similar to Fig. 2 thereof;

Fig. 5 is a rear view of the same; i Fig. 6 is an enlarged end view ofone of the operating levers for automatically engaging and releasing thematrices; and

Figs. 7 8,9, 10 andll arediagrammatic.

end views showing the various steps of the operation of thisform of theinvention.

Heretofore this roasting operation has been practically carried on byhand in a very inaccurate way and the degree of roasting has beendependent upon the judgment of the operator. The device as used atpresent involves the placing of a single matrix in the roasting oven byhandand its proper positioning in the same Way. It is roasted for aslong aytime as theoperator may desire. If the capacity is only onematrix, it cannot be speeded up in case of emergency, in any wa It isfor the purpose of obviating these difficulties and increasinguniformity of the products that this invention has been dej vised. Theprincipal objects of the invention are Referring to the form shown inFigs. 1 and 2 I have shown a matrix roaster comprising a frame 10,having a board or platform 11 for receiving the matrices M from a pilefrom which they are delivered by hand or otherwise to the roaster. Theroaster is operated by a motor 12, mounted suitably on the frame andcapable of longitudinal adjustment by a crank 13 and threaded rod 14.This is for the purpose of movingthe motor bodily so that a driving roll15 on the shaftthereof can be moved along the face of the friction disc16 to vary the speed of thisdisc. The disc 16 is mounted on a shaft 17provided with a worm 18 operating a worm wheel 19 on the roaster shaft20. It will be seen therefore that the shaft 20 can be driven at suchspeed as may bedesired and that also the speed is cut down.

On this shaft 20 is loosely mounted a receptacle or drum 21 providedwith steam pipes 22, fed by a supply 23, these parts being mounted in astationary position but centered on the shaft 20. Rotatable with thegear or worm wheel 19 is ahead 24 of the drum closing oneend of it. Theother end is closed by a ring 25 resting onthe circumference of one ofthe stationary ends 21. The drum is It may be stated at this point thatthe stationary drum heads 21 are also surrounded by a cylindrical wall27 a spaced from the wall 26.

On the outside of the rotating drum 26 which is acontinuous cylinder area plurality of movable walls or covers 27, each pivoted to the drum byhinges 28. I have shown three of these covers. Each one is provided witha spring cam 29 adapted to be operated by a rod 30 fixed instationaryposition between the ends 21.

Each cover is pivoted on a shaft and is provided with a stop 31 forlimiting the outward movement of the cover. The frame is provided with astationary plate 82 for positively holding the covers down in a certainposition and there is a delivery chute 33 for receiving the matrices. i

' that time the cam 29 engages the rod 30 and the upper cover 27 israised so that the matrix can be lowered into the pocket thus formed. Asthe drum rotates past the rod 30, the cover 27 moves from against thedrum first by gravity and then is held there by the stationary plate 32.This cover 27 forces the matrix to assume a curved shape of the rightdiameter because the drum 26 is of the same radius as the outer surfaceo'fthe printing plate to be cast. Therefore the matrix will be dried atthe right curvature. I

edge of the plate 32 it will swing down by gravity and allow the matrixto drop by gravity into the chute or stand: 33. As the drum nowcontinues to rotate, the particular cover 27 which has been describedwill stay open until it reaches the top of the drum when it is closed bygravity and then it will open by the'rod 30 when it reaches the positionshown in Fig. 1. r,

It'will be seen that in Fig. 1, three of these covers are shown, one inroasting position,

one in raised position and one in idle position againstthe drum. 7 y

Referring now to the form'shown in the last three sheets,it may bestated in general that this is a very similar machine with certaindetails different. The principal feature is that it is arranged to pickthe matrix automatically from a set of guides in which the matrix hasbeen received from a chute leading from the composing room. Whenever amatrix is ready to be roasted it is dropped through the chute into theguide and 1 the roaster automatically picks it up and automaticallydelivers it. p

In this case the operating means is the same.

The construction of the drum also is the same and the way of heatingit.- The covers 27 are pivoted in the same way on hinges 28but each oneis provided with an operating lever 34 which cooperates with an arcuatecam 35 located in stationary position on one of the ends 21 and adaptedto manipulate this cam 34 in opposition to a spring 36. The sprmg holdsthe cover 27 against the drum wheneverthe lever 34 is not in contactwith the cam. It is necessary therefore that the cover-be closed at allother times.

In Fig. 3 I have shown the parts in position for delivering a roastedmatrix at the left.

The cover 27 at the bottom is still open but the lever 34 will be readyto be dropped off the cam 3.5. ,This provides for engaging the matrixwhich is located in guides 38' from As the drum'continues to rotate, assoon as the tail end of the cover 27 passes the lower which it has beendropped through a chute a 39. It is hardly necessary to describe thedetails in view of Figs. 7 to 11 which show only one of the covers 27for the purpose of illustrating its operation. In Fig. 7 the cover 27 isin the same position as in Fig.3 at the bottom. As the drum rotates alittle more, the lever 34 drops off the cam 35 as shown in Fig. 8 andthe cover is about to grasp the matrix and pull it back againstthe'surface of the drum, which operation is shown in Fig. 9. V

In Fig. 10, the drum has rotated around far enough so that the matrix iscompletely roasted and the cam 35 is just opening the cover, the matrixbeing shown invcontact' witli'the surface of the drum; In Fig. :11, isshown the 1 last process which is the freeing ofthe matrix by gravity. 7

It will be seen therefore that in either-of however, the matrices arecoming through too wet or too hot. adjustment is secured through thecrank 13. placed in the machine necessarily in the right posltlon andthey are necessarily curved to the proper curvature The judgment of theoperator is entirely eliminated after the first set up and there is nodifficulty aboutgetting thematrices into the machine in the properposition. x Although only two forms of the invention I am aware of thefact that modifications can be made.

therein byany person skilled in the art without departing from the scopeofthe invention as expressed in the claims. Therefore,

I donot wish to be limited toall the details of construction hereinshown and described, but what I do claim is:

. 1. In amachine for roasting curved stereo-- type printing platematrices, the combination wlth a receptacle having curved walls carriedby the receptacle between which a .moist matrix can be clamped to causeit to conform to their shape, means for heating the matrices while heldthereby, means for moving saidholding: walls to carry the matrices froma receiving point to ardischarge. point, and

means for automatically discharging the matrices at said dischargepoint; i

2. In a machine for roasting matrices,-the combination with a rotarydrum having pivotally mounted meansfor receiving and holding a pluralityof matrices ata time incur-ved condition, and means for rotating it, ofmeans I for heating the drum to drythe matrices as The matrices; are

I have illustrated and described" 3 these forms the operation-iscontinuous and J heating the matrices, with means for discharging frombetween said walls the mat rices one by one as they reach apredetermined point.

4:- In a matrix roasting machine, the combination .o'fa rotary drumhaving walls between Which a plurality of matrices can be clamped at atime to dry them, and means for heating the matrices, with means forguiding the matrices by gravity into the drum at one point.

5. In a matrix roastlng machine, the combinatlon with a cylin'drlcaldrum having a radius equal to that of the concave side of a matrix, andmeans for rotating the drum, of a series of concave covers attached tothe drum and rotatable with it for holding the matrices against the drumand shaping them as they are received and dried, and means automaticallyopening said covers for releasing the matrices.

6. In matrixroasting machine, the combination with a cylindrical drumadapted to receive a plurality of matrices on its surface, and means forrotating the drum at constant speed, of concave covers hinged to thedrum at intervals around its circumference, and means for holding eachcover down on a matrix to press it against the drum and shape it, andmeans operating to open said covers when theyrotate around to a pointnear the bottom to discharge the matrices automatically by gravity.

In a matrix roaster, the combination with a cylindrical drum rotatableon a horizontal axis, and a cover hinged to the drum, of means forraising the cover as it comes to the top to form a pocket for receivinga matrix, and means for positively closing each cover thereafter to holdthe matrix against 7 the drum and operating to release the cover as itnears the bottom to allow the matrix to be discharged by gravity at thebottom.

8. In a matrix roaster, the combination with a cylindrical drumrotatable on a horizontal axis, and a cover hinged to the drum, of astationary cam for raising the cover at the top, and a plate for holdingthe cover against the drum as it rotates through part of a revolutionand then releasing it to discharge the matrix near the bottom.

In testimony whereof I have hereunto atfixe'd my signature.

OSCAR CHARLES ROESEN.

